80 percent of people who lose weight gain it right back. Here’s what the other 20 percent know.

By Samantha Dunn

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Make Special Occasions Count

"Before you walk in the door of a restaurant," says Susan Buckley, "think, 'Is this just a meal I don’t want to cook at home, or is it a special occasion?' If it’s the latter, go ahead and indulge, because such moments come only once in a while. Otherwise, you need to think about proportions and what you order."